Fuel-supply apparatus



April 9, 1929. M. CSAPAYI ET AL 1,708,535

FUEL SUPPLY APPARATUS Filed May 1, 1925 H! /7 I 42 5 A; 25-? m M" I w I will? /4 I I I 1 J I: i

w H l H I INVENTORS'.

BY W444 M Ma,

ATTORNEYS;

tus by I objects,

,levers with counter-weights,

. in which by way Patented Apr. 9, 1929. g

UNITED .STATES PATENT OFFICE.-

F EL-surrey nrrnna'rus.

Application filed Ma 1,1925,

This invention relates to fuel supply apparatus and particularly to those employed on motor cars for the purpose of sucking the fuel up from a receptacle'containing the fuel stock and supplying, it to the carburetter of the motor. 1

The object ofthe present invention is to provide an improved form of such apparawhich complete evacuation is under all circumstances, prevented, even if the motor be (overcharged. Furthermore the constructionis simplified, most reliableworking being thus assured and the costs of manufacture being reduced.

According to the present invention these are obtained by providing the re ceptacle containing the float with'a discharge tube of relatively very large cross-section, so that at the moment of opening the air control valve, the evacuationof the receptacle containing the float takes place instantaneously. Consequently any auxiliary device which has hitherto been necessary for the purpose of keeping the float for a prolongated time in its highest position, such'as springs or the like, can be dispensed with. F Further features of the apparatus according to the present invention will be explained in referring to the accompanying drawing,

of example a'sectional elevation of an embodiment of our apparatus is shown.

1 is the outer receptacle, the base 2 of which is adapted to be connected by a pipe for example to the carburetter of an internal combustion engine. The interior of this outer receptacle communicates with the atmosphere by an opening 3, provided in the upper part of its cylindrical wall. Withinthe receptacle 1 anotherreceptacle 4, designated the fioat receptacle mounted, and in the bottom of this float receptacle a discharge tube 5 is provided. The orifice'of this, discharge tube is closed by a flap valve 6, which by means of a counter-weight 7 is slightly pressed against the rim of the discharge tube 5. The diameter of the dis charge tube 5 is about one third or one fourth of the diameter of the receptacle 4 in order -to permit rapid evacuation of the latter,

when the flap Within the provided, this float having vertical move:

valve opens.

ment, its tubular extension 9 being guided bya tubular extension 10 of the cap 11 which is a splash,

float receptacle.4 the float 8 is Serial No. 27,140, and in Austria Kay 14, 1924.

provided for. the receptacle 1. The float receptacl e 4 is secured tothe cap 11. The tube 9 is the only guiding member of the float. Its guiding outer diameter is slightly (a few tenths of a millimeter) smaller than that of the bore of the extension 10 in order to prevent jamming under all circumstances; A screw 12, engaging with a slot 13 in the tube' 9, forms a stop determining the end positions of the-float. In the wall of the tube 9 anopening 14 is provided, by which the interior space of the tube communicates with that of the receptacle 4. This opening lies within a recess 15 of the extension 10, so that the cover or cap 11 acts somewhat like a safe-guard preventing fuel or drops thereof, when the fuel enters the receptacle with from entering said opening. Below the opening 14 the tube 9 is closed up by a division 16,:abovesaid opening a perforated division 17 is provided with a pin 18 centrally arranged thereon, which pin controls.

and actuates the conical valve 19 mounted in the extension 10 and having a relatively large seating (contact surface). The rod 20 of this valve is guided by a hole in the cap 21 of the extension 10, in which cap also openings 22 are made for the purpose of admitting air. This cap contains an air filter 23 and is screwed into the tubular extension 10, thus allowing removal and clean;

ing of the filter as desired.

A socket 24 is insertedsidewise into the wall of the extension 10, by means of which socket the suction pipe of the motor may be connected to the apparatus. The connection of the apparatus with the fuel tank, which tank is arranged below the suction apparatus, is effected by means of a pipe, the discharge end of which is" secured to the apparatus by means of the socket 25.

At the position of the parts as illustrated the fuel within the receptacle 1 is at level with that of the fuel inthe'float receptacle 4. The entire area of the orifice of the socket 24 is left uncovered by the tube 9 while communication of the float receptacle 4 with the outer air is interrupted by the conical valve 19. Consequently the sucking action of the motor will rarify the air within the float receptacle 4. Simultaneously, owing to the consumption of fuel by the motor, the level within the receptacle 1 will drop. When the evacuation of air from the receptacle 4 has attained a certain degree, fresh fuel will enter through the socket 25 into the receptacle 4 from the supply tankto raise the level of the fuel within the float receptacle 4. When this level has attained a certain point, the float '8 begins to mount and its tube 9 will successively throttle the. orifice in the socket 24 but not fully close it up, until finallly 'is established within the receptacle 4 above the level of the fuel therein, the flap valve 6 is opened by the weight of the liquid column resting thereon and fuel is discharged from the receptacle 4einto the receptacle 1, till the liquids in bothreceptacles are at the level again. If the level in the float receptacle 4 drops, the float descends,(the valve 19 closes and the aperture in the socket 24 is uncovered, so that a cycle of operations will be repeated.

As compared with existing apparatus for supplying fuel, the present device is of material advantage in that the lever and counter weight or their equivalent present in existing apparatus are superfluous; Such levers with counter weights or some analogous devices have hitherto been necessary for the purpose of maintaining the float in its highest position after opening of the air valve for a sufficient length of time to allow the required amount of liquid to flow off from the receptacle containing the float. With the present arrangement however such device is superfluous, as the large discharge 1 tube 5 permits instantaneous evacuation of I is also, even if the motor is under heavy load,

the receptacle 4. Furthermbre, inasmuch as,

levers and weights are dispensed with in the present apparatus, which exercise a choking action on the movement of ,the float, there no risk of the receptacle 1 being ever fully emptied before the air valve is opened and replenishing sets in.

During normal working of the motor the differences of level within the receptacles l and 4 will not amountto more than a few millimetres, whichfact also contributes to preventing the receptacle 1 from being completely evacuated. Furthermore the tube 9 can be guided in the extension 10 so as to leave ample" space between them in order to avoid alLdanger of jamming of the float.

This result is also assured by the fact, that the movement of the float is determined within such limits as will allow the orifice 26 to be throttled only, but neveryfully covered and closed up. Finally, reliable working of the apparatus is also assured by employing a disc valve for controlling the admission of air. Owing-to the large seating surfaceiof this valve, the danger of accidental opening of the valve, due to shocks and'ja-rsyto which the apparatus is necessarily subjected, is avoided. The guiding rod 20, which extends outward through the cap 23, enables the working of the apparatus to be observed and controlled without any special device.

What we claim is:

- 1. A fuel supply apparatus comprising a receptacle'adapted to be connected to a carbureter, a float receptacle with a fuel inlet port adapted to be connected to a fuel tank, a relatively large discharge tube therefor, a float within the float receptacle provided with a tubular -extension adapted to serve as guiding means for the float, a cap for the first mentioned receptacle, a tubular extension for said cap in which the float extension is guided, and a socket for a suction pipe branched oil from the tubular extension of the receptacle cap, the port of said suction pipe provided by said socket being consider,- ably larger in areathan the section of the suction pipe.

2. A fuel supply apparatus comprising a receptacle adaptedto be connected to a car bureter, a float receptacle with a fuel inlet port adapted to be connectedto a fuel tank, a discharge tube therefor having a diameter from one-quarter to one-third that of the float receptacle, a float within the float receptacle provided with a tubular extension adapted to serve as guiding means for the float, a cap for the first mentioned receptacle, a tubular extension for said cap in which the float extension is guided, an air admission valve in said cap extension for controlling the admission of air to the apparatus, and a.

socket for a suction pipe branched oifv from the tubular extension of the receptacle cap, the. port of said suction pipe provided by the socket being considerably larger in area than the section of the suction pipe.

In testimony whereof we have afiixed our signatures. I

' MICHAEL CAPAYL RICHARD CURDA. 

